Re: [IPv6] Lost my IPv6 IP again....

You do know what beta test software is, don't you?

From the crash log, my guess would be that your pfsense box was not able to establish a new IPv6 connection when the WAN IPv6 address changed.

FWIW, my Comcast supplied Netgear WNR1000v2-VC router also loses IPv6 connectivity somewhat randomly (~one week intervals) because the WAN IPv6 address changes, and the router's firmware can't seem to handle that. A reboot always wakes it up, but yes, it is a PITA, and that is why that router has been demoted to being a guest router.--A well-regulated militia, being necessary to the security of a free State, the right of the people to keep and bear arms shall not be infringed.

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